微服务怎么玩？(三)
springboot 1.5.9.RELEASE
springcloud Dalston.SR1
引入Eureka
先建个表
DROP DATABASE IF EXISTS cloudDB01;
CREATE DATABASE cloudDB01 CHARACTER SET UTF8;
USE cloudDB01;
CREATE TABLE dept
(
deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
dname VARCHAR(60),
db_source VARCHAR(60)
);
INSERT INTO dept(dname,db_source) VALUES('开发部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('财务部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('市场部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('运维部',DATABASE());
SELECT * FROM dept;
 >父工程的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tzy.spring</groupId>
<artifactId>cloud2018</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<junit.version>4.12</junit.version>
<log4j.version>1.2.17</log4j.version>
<lombok.version>1.16.18</lombok.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>1.5.9.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.0.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.31</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<!--读取配置文件开始,在src/main/resources目录下的已$开始$结束的配置文件信息可以读取,暂无效-->
<finalName>cloud2018</finalName>
<resources>
<resource>
<directory>src\main\resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<delimiters>
<delimit>$</delimit>
</delimiters>
</configuration>
</plugin>
</plugins>
<!--读取配置文件开始结束-->
</build>
<modules>
<module>cloud-api</module>
<module>cloud-provider-dept-8001</module>
<module>cloud-consumer-dept-80</module>
<module>cloud-eureka-7001</module>
<module>cloudeureka7002</module>
<module>cloud-eureka-7002</module>
<module>cloud-eureka-7003</module>
</modules>
</project>
 >子工程其一pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>cloud2018</artifactId>
<groupId>com.tzy.spring</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-api</artifactId>
<dependencies><!-- 当前Module需要用到的jar包，按自己需求添加，如果父类已经包含了，可以不用写版本号 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
</dependencies>
</project>
>实体类Dept.java
package com.tzy.spring.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import java.io.Serializable;
@NoArgsConstructor
@AllArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable
{
private Long deptno; // 主键
private String dname; // 部门名称
private String db_source;// 来自那个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息被存储到不同数据库
}
>另外两个暂时没用到,这个子工程主要用来提供实体类API >我们在来看下面三个子工程，这是在 ####部署eureka-service集群   >结构是一样的，先修改本机的hosts文件  
7001-7002-7003的pom.xml和启动类就只有属于自己的id不同，其他都相同，以下列出一个
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>cloud2018</artifactId>
<groupId>com.tzy.spring</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-eureka-7001</artifactId>
<dependencies>
<!-- SpringCloudConfig配置 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<!--eureka-server-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka-server</artifactId>
</dependency>
<!-- 热部署插件 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
package com.tzy.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
/**
* EurekaServer服务器端启动类,接受其它微服务注册进来
*/
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication7001
{
public static void main(String[] args)
{
SpringApplication.run(EurekaServerApplication7001.class, args);
}
}
>yml文件则是端口不同，7001对应7002--7003,7002对应7001---7003,7003对应7001---7002。
server:
port: 7001
eureka:
instance:
hostname: eureka7001.com #eureka服务端的实例名称
client:
register-with-eureka: false #false取消服务器自我注册
fetch-registry: false #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
serviceUrl:
#defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka #对外暴露的eureka地址
defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
spring:
application:
name: eureka-server
#服务的注册与发现  >首先pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>cloud2018</artifactId>
<groupId>com.tzy.spring</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-provider-dept-8001</artifactId>
<dependencies>
<!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
<dependency>
<artifactId>cloud-api</artifactId>
<groupId>com.tzy.spring</groupId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- actuator监控信息完善 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- 将微服务provider侧注册进eureka -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<!-- SpringCloudConfig配置 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- 修改后立即生效，热部署 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
>yml文件
server:
port: 8001
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
type-aliases-package: com.tzy.spring.entities # 所有Entity别名类所在包
mapper-locations:
- classpath:mybatis/mapper/**/*.xml # mapper映射文件
spring:
application:
name: cloud-dept # 对外暴露的微服务名字 很重要很重要很重要很重要
datasource:
type: com.alibaba.druid.pool.DruidDataSource # 当前数据源操作类型
driver-class-name: org.gjt.mm.mysql.Driver # mysql驱动包
url: jdbc:mysql://localhost:3306/cloudDB01 # 数据库名称
username: root
password: root
dbcp2:
min-idle: 5 # 数据库连接池的最小维持连接数
initial-size: 5 # 初始化连接数
max-total: 5 # 最大连接数
max-wait-millis: 200 # 等待连接获取的最大超时时间
eureka:
client: #客户端注册进eureka服务列表内
service-url:
#defaultZone: http://localhost:7001/eureka #单机版是这样，集群是下面那样
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
instance:
instance-id: cloud-dept8001 #自身入住服务的别名,网站中间右边的显示名
prefer-ip-address: true #访问路径可以显示IP地址
info: #点击别名后返回的信息，服务发现后打印的信息
app.name: lalala
company.name: www.cnblogs.com/ttzzyy
build.artifactId: $project.artifactId$
build.version: $project.version$
>启动类
package com.tzy.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient //本服务启动后会自动注册进eureka服务中
@EnableDiscoveryClient //服务发现
public class DeptProvider8001_App
{
public static void main(String[] args)
{
SpringApplication.run(DeptProvider8001_App.class, args);
}
}
 >源路径下的结构 mybatis.cfg.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="cacheEnabled" value="true" /><!-- 二级缓存开启 -->
</settings>
</configuration>
>DeptMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.tzy.spring.dao.DeptDao">
<select id="findById" resultType="Dept" parameterType="Long">
select deptno,dname,db_source from dept where deptno=#{deptno};
</select>
<select id="findAll" resultType="Dept">
select deptno,dname,db_source from dept;
</select>
<insert id="addDept" parameterType="Dept">
INSERT INTO dept(dname,db_source) VALUES(#{dname},DATABASE());
</insert>
</mapper>
 >src下的结构 DeptDao.java
package com.tzy.spring.dao;
import com.tzy.spring.entities.Dept;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
@Mapper
public interface DeptDao
{
public boolean addDept(Dept dept);
public Dept findById(Long id);
public List<Dept> findAll();
}
>DeptService.java
package com.tzy.spring.service;
import com.tzy.spring.entities.Dept;
import java.util.List;
public interface DeptService
{
public boolean add(Dept dept);
public Dept get(Long id);
public List<Dept> list();
}
>DeptServiceImpl.java
package com.tzy.spring.service.impl;
import com.tzy.spring.dao.DeptDao;
import com.tzy.spring.entities.Dept;
import com.tzy.spring.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class DeptServiceImpl implements DeptService
{
@Autowired
private DeptDao dao;
@Override
public boolean add(Dept dept)
{
return dao.addDept(dept);
}
@Override
public Dept get(Long id)
{
return dao.findById(id);
}
@Override
public List<Dept> list()
{
return dao.findAll();
}
}
>DeptController.java
package com.tzy.spring.controller;
import com.tzy.spring.entities.Dept;
import com.tzy.spring.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
public class DeptController
{
@Autowired
private DeptService service;
@Autowired
private DiscoveryClient client;
@RequestMapping(value = "/dept/add", method = RequestMethod.POST)
public boolean add(@RequestBody Dept dept)
{
return service.add(dept);
}
@RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
public Dept get(@PathVariable("id") Long id)
{
return service.get(id);
}
@RequestMapping(value = "/dept/list", method = RequestMethod.GET)
public List<Dept> list()
{
return service.list();
}
// @Autowired
// private DiscoveryClient client;
/**
* @param []
* @return java.lang.Object
* @describe 服务注册与发现 的发现二字，说的是自己哦。对整个微服务遍历，查出自己信息，打印出来
* 测试结果**********[cloud-dept]
* CLOUD-DEPT 192.168.0.105 8001 http://192.168.0.105:8001
*/
@RequestMapping(value = "/dept/discovery", method = RequestMethod.GET)
public Object discovery()
{
List<String> list = client.getServices();
System.out.println("**********" + list);
List<ServiceInstance> srvList = client.getInstances("CLOUD-DEPT");
for (ServiceInstance element : srvList) {
System.out.println(element.getServiceId() + "\t" + element.getHost() + "\t" + element.getPort() + "\t"
+ element.getUri());
}
return this.client;
}
}
您的资助是我最大的动力！
金额随意,欢迎来赏！
